“…As a consequence of their investigation into the Ni/Al2O3 catalyst, Hu, Gao, Ping, Jia, Gunawan, Zhong, Xu, Gu and Su [6] discovered that it was possible to achieve 100% CO conversion over a broad range of reaction temperatures around 300 to 550 °C, and that the CH4 selectivity amplified with growing temperature, peaking at 96.5% at a comparatively low reaction temperature of 350 °C. In the following study, Xiao, Song, Liu, Shi, Ge, Zhu, Liu and Liu [23] investigated the optimal catalyst of NiO/NiO-OMA, the extraordinary activity at temperatures as low as 300 °C was accomplished with the methane space-time yield exceeding 7.6 g gcat -1 h -1 . As a result of the high temperature of 600 °C and 120,000 mL g -1 h -1 of gas hourly space velocity (GHSV), long-standing stability for 400 hours was proven with no evidence of deactivation.…”